package com.vfmall.controller.user;

import com.vfmall.constant.StatusConstant;
import com.vfmall.entity.Dish;
import com.vfmall.result.Result;
import com.vfmall.service.DishService;
import com.vfmall.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishUserController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        //构造redis中的key，规则：dish_分类id
        String key = "dish_" + categoryId;
        //查询redis中是否存在菜品数据
        List<DishVO> dishList = (List<DishVO>)redisTemplate.opsForValue().get(key);
        if(dishList != null && dishList.size()>0){ //如果存在，直接返回，无须查询数据库
            return Result.success(dishList);
        }else{
            //查询起售中的菜品
            //如果不存在，查询数据库，将查询到的数据放入redis中
            Dish dish = new Dish();
            dish.setStatus(StatusConstant.ENABLE);
            dish.setCategoryId(categoryId);
            List<DishVO> list = dishService.listWithFlavor(dish);
            redisTemplate.opsForValue().set(key,list);
            return Result.success(list);
        }


    }

}
